New answers tagged unbricking
Sounds like a corrupted operating system preventing a full system boot. I would flash a stock system image. I have provided links below to a few helpful resources that will hopefully get you back up and running! Take a look at this website: http://forum.xda-developers.com/wiki/Samsung_Galaxy_S_III/GT-I9300 Navigate to the enter download mode section. Then ...
A carrier or the manufacturer with the correct JTAG setup are likely the only ones who can help you. If you can't get even the bootloader to work there's nothing you can do as a user.
Which phone brand and model? Search in the internet for the firmware. If it is a samsung you can use software ODIN and reinstall stock-firmware. Press and hold Volume Down, Home and Power buttons, all at the same time, this will give you download mode. If everything is back to normal, as a precaution then flash clockworkmode or TWRP recovery (this is more ...
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